Thanks for the background and links, which I wish I would have seen before posting my comment.

I still think there is a bit of, not necessarily resentment, but a bit of annoyance at the upstart US, which comes across to most other countries as "unrefined." I think the major difference between Americans and Brits is that the US doesn't have centuries of history behind it. It's still very much a "young" nation in the overall scheme of things and shows its age quite often. (See also: the other comment I made.)